ALTERNATOR TESTING AND REPAIR (ALL EXCEPT M1010) (Cont).
Turn 500 amp test stand master power switch and master load switch to ON and battery
switch to 12V DC. Green lamp on 500 amp test stand must illuminate.
When tachometer reaches 6500 rpm, test light should go out to indicate
proper charging from alternator.
Raise speed until tachometer reads 6500 rpm.
Set one 100 amp load switch on 500 amp test stand to ON.
Readings should be 14.0 volts and 90-100 amps. If readings are not correct, repair alternator.
Remove 4 bolts (4) and separate end frame (1) and stator frame (3) from drive end housing
Place a piece of tape over end frame (1) bearing to prevent entry of dirt and foreign material if
bearing will not be replaced.
Remove 3 nuts
should be handled with caution to avoid damage to coils. Failure
this caution may result in shorted stator and low alternator
(6) and stator (5) from end frame (1).